How much does it cost!

Although he could have designed a better ball bearing, Zhu Mingzhong now prefers to buy the patent for this roller bearing, which still seems somewhat primitive, because it represents the technological progress of Daming. It is an invention without his intervention, and such creation should naturally be encouraged.

Moreover, Zhu Mingzhong knew what kind of changes this roller bearing would bring to the carriage, and he was able to realize its value. The advent of roller bearings will undoubtedly bring qualitative changes to the transportation industry of the Ming Dynasty, the speed of the carriage will become faster, the loading capacity will be larger, of course, the railway will also benefit from it, the same pull, a "train" composition more, and the carrying capacity is larger.

At this time, Zhu Mingzhong seemed to have seen the appearance of the new-style carriage galloping north and south of the river, and saw the scene of the new-style train leading all the way to the Western Regions. And it will bring countless wealth to the merchants, it will also bring him wealth, and more importantly, it will bring a small revolution to traditional transportation.

"You, you're going to buy it?"

Dai Zi looked at the person in front of him in surprise,

"Are you sure?"

"Of course, ten thousand...... Fifteen thousand taels, how? ”

What the!

"Fifteen thousand taels!"

Dai Zi shouted in surprise.

"You're going to pay fifteen thousand taels for it?"

He never thought that his invention would be worth so much money, for him, as long as he could sell it, but the person in front of him was willing to buy this bearing for fifteen thousand taels.

"That's right, it's fifteen thousand taels!"

"Just this little thing?"

As soon as Zhu Mingzhong's words fell, the businessmen who had been attracted by Dai Zi's shout all looked at the copper bearing in surprise, and they couldn't believe that it was worth so much silver.

"Fifteen thousand taels, good boy, what is so valuable!"

"On the carriage!"

"On the carriage? That's enough for hundreds of wagons!

"But no, if you buy it at such a large price, how many carriages do you have to sell to get it back?"

Everyone's words made Zaizi blush.

"First of all, sir, isn't this worth so much?"

"Why isn't it worth it?"

Zhu Mingzhong shook his head and looked at Dai Zi and took the initiative to explain to him.

"With this bearing, the original two-pull carriage can become a single pull, and the speed does not decrease, the load does not decrease, as long as a few bearings are replaced, less than one horse, more than a few horses, such a good thing, how can it not be worth the price?"

Zhu Mingzhong didn't say how useful it was, but just told the public directly that it could reduce the use of horses, so it was enough, after all, the cost of raising horses was not low. One less horse, the silver saved is not a fraction.

"Sir, you're saying that this thing can save a few horses......"

Just when a businessman was interested, Zhu Mingzhong had already picked up the bearing, and then turned it slightly, and when the sound of its rotation was spinning in his hand, Zhu Mingzhong said with a smile.

"Can the bearing turn so easily?"

Of course not!

Even a freshly dripping pad can't turn like that. If there was some confusion before, some merchants now realized the wealth it contained, and almost immediately someone asked tentatively.

"This son, this is your invention, the gentleman just now bid 15,000 taels, and I bid 16,000 taels......"

"I'll give you seventeen thousand taels!"

Someone actually raised the price!

In an instant, the museum became lively, and everyone in the neighborhood was attracted to it. After realizing the wealth contained in this book-sized bearing, people began to increase the price, after all, there are tens of thousands of carriages in the Ming Dynasty, and it is a dozen or even hundreds of thousands of bearings a year...... Why not?

"Twenty thousand!"

In the sound of everyone's price increase, Dai Zi, who had been shocked by these enthusiasm, saw the previous gentleman, just standing aside with a smile on his face, thinking that it was his insight and talent that made everyone bearing.

"Ladies and gentlemen, listen to me, this, this I, I have already transferred the patent to this gentleman, if you are interested, you may wish to discuss with this gentleman."

directly pushed off a huge sum of five thousand taels.

Heartache? Even for Dai Zi, who went out of the official palace, it really made his heart ache for a while, but he didn't regret it, and even thought that he would soon have a large amount of silver in his account and could continue to engage in research, and he became red at this moment.

For him, the money was only for research.

Dai Zi's refusal disappointed everyone, and praised his character, after all, people who can see the benefits of righteousness will always be admired, and after admiration, everyone has even begun to think about it, some are thinking about whether to buy it from this person at a high price, and some are thinking about whether this kind of bearing can be improved, after all, there are loopholes in the patent law.

Just when the adults were thinking about it in their hearts over there, Hejia, Heyu, Yuxin, Yuting and his sister and brother were still playing in the Gewu Pavilion, and now Daming didn't need to worry about the Flower Shooting Party to prey on children, because there was a cool law to sanction this, as long as it was caught, it would be beheaded if it was light, Ling Chi if it was heavy, and the three clans were exiled. Even for the buyer, it is a heavy punishment, not only the buyer's family is exiled for ten years, but even the three clans are exiled. Because of this, plundering children has become a high-risk industry in Daming, and the occasional case is often reported by the buyer's relatives and neighbors in order to avoid continuous sitting.

This kind of seating may seem crude, but it is very effective. Almost since the second year of Xingqian, there have been no cases of plundering people's children. Of course, He Jia, He Yu, Yu Xin, Yu Ting They don't need to worry about this, after all, when they are looking left and right, there are always people not far behind them.

For these children, it seems that everything here is interesting, but often not very fun, after all, there is nothing for children to play here, just when they find it boring. Suddenly, Zhu Hejia saw something. It was an egg-sized gray-white ball, and after asking for the consent of others, he picked it up and felt that the ball was hard, but if he pinched it hard, he could feel its elasticity.

"Is it table tennis?"

Zhu Heyu also stared at the ball curiously and said. Table tennis was an entertainment brought to this era by Zhu Mingzhong, except that its balls were made of cork.

"The table tennis ball is made of cork. This is not cork. ”

Zhu Hejia, who was a little curious about this small leather ball, threw the small ball in his hand to the ground on a whim, and the small leather ball bounced several meters away at the moment it hit the ground.

"It's so high!"

Now a few children can be regarded as having fun. It's a pity that the things here are certainly not for them to play with, and while they are running to retrieve the bouncing ball, the students guarding the glass cabinet over there are smiling and trying to take the ball back.

"How much does this cost?"

For this small leather ball that can pop a few fathoms high, Zhu Hejia naturally started to think about it, so he immediately started to think about it.

"Yes, yes, how much is one, how many are here, and sell them to us? I'll do the math......"

When Zhu Heyu counted how many brothers and sisters could play with this ball, the students over there refused without hesitation.

"The little boy laughed, the things here are exhibits, not for sale, these exhibits are collected from all over the world......"

At this moment, Zhu Mingzhong, who had just completed the formalities over there, had already walked over, and when the children saw him coming, they immediately shouted.

"Dad, Dad, come and see, the little leather ball here is interesting, it can be played a few feet high at a time!"

In the pull of the children, they came to the glass cabinet and saw the ball in the cabinet, so they asked with a smile.

"I guess I got it from the Americas!"

Although its appearance was different from that of the imagined rubber, Zhu Mingzhong still recognized it, it was rubber, and nothing could have such elasticity unless it was rubber.

"This gentleman is really knowledgeable, this is Mr. Alfonso from the school from the Americas, it is very elastic, the local natives play the ball with it, and they will also apply some white thick liquid to the clothes, this kind of clothing is impervious to rain on rainy days, we found that this material is very effective in wiping off the marks left by pencils......"

Listening to the student's explanation, Zhu Hejia brothers said with great interest.

"Dad, you talk to the ancestor and give us these balls."

The ancestor, naturally, is the mountain chief Zhu Zhiyu of Qinghe Academy, the children's words, the student looked at the person in front of him in surprise, he is the student of the mountain chief? However, even if they are the students of the mountain chief, I am afraid that the mountain chief may not necessarily give these leather balls to them, after all, they are too precious.

"It's ......"

Suddenly, Zhu Mingzhong's attention focused on a glass box next to the leather ball, which contained more than a dozen quail egg-sized seeds, which could be recognized from the patterns on them, which were rubber seeds.

"It's its seed!"

At this time, Zhu Mingzhong's tone was a little anxious, when the Navigation Association began to sail to the Americas, he had already instructed them to collect local species, especially the seeds of cinchona trees and rubber trees, but he never expected to see rubber tree species here.

"Yes, sir, these were collected by Mr. Alfonso from the Academy, he had been a missionary in the Americas for many years, and as a botanist, he collected a lot of seeds during his time in the Americas, but this tree is not suitable for planting in Qinghe......"

Of course not, it's a tropical crop!

"Are there only a dozen or so seeds? Anything else? ”

Zhu Ming immediately asked.

"Professor Alfonso may have some there."

The doubts in the student's mind are even greater, why is this person so interested in this thing?

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